<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        div {
            width: 1210px;
            margin: 200px auto;
            color: red;
            text-align: center;
            font: 600 30px/30px "simsun";
        }
    </style>
</head>
<body>
    <div></div>
		<script>
    var div=document.getElementsByTagName("div")[0];
    var timer = setInterval(fn,1);
    function fn(){
				var nowtime = new Date();
				var future = new Date("2019/09/05 18:23:15");
				var timeSum = future.getTime() - nowtime.getTime();
				var day = parseInt(timeSum/1000/60/60/24);
				var hour = parseInt(timeSum/1000/60/60%24);
				var minu = parseInt(timeSum/1000/60%60);
				var sec = parseInt(timeSum/1000%60);
				var millsec = parseInt(timeSum%1000);
				day = day<10?"0"+day:day;
				hour = hour<10?"0"+hour:hour;
				minu = minu<10?"0"+minu:minu;
				sec = sec<10?"0"+sec:sec;
				if(millsec<10){
					millsec="00"+millsec;
				}else if(millsec<100){
					millsec="0"+millsec;
				}
				
				
// 				console.log(day);
// 				console.log(parseInt(timeSum/1000/60/60/24));
				if(timeSum<0){
					div.innerHTML="距离苹果发布会还有00天00小时00分00秒000毫秒";
					cleartInterval(timer);
					return;
				}
				div.innerHTML="距离苹果发布会还有"+day+"天"+hour+"小时"+minu+"分"+sec+"秒"+millsec+"毫秒";
			}
			
			
		</script>
	</body>
</html>
